Telephone dialing-key cover



FIG. 1 is a top, left, front perspective view of a telephone dialing key cover showing my new design;

FIGS. 2 and 3 are respectively rear and front elevational views thereof;

FIGS. 4 and 5 are respectively left and right side elevational views thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for the telephone dialing-key cover, as shown and described. 